he may face questions about what he knew as a top murdoch executive in britain in 2007. then there are the murdochs themselves-- rupert, the tycoon head of news throughout the world's largest media conglomerate after disney; and his son and heir apparent, james, who is now known to authorize payments to victims of phone hacking, although he says he didn't have the complete picture at the time, and regrets what he did. >> how would one put it politely? there's no on else to throw over. if the boat is still sinking... >> reporter: both rupert and his son james will appear before a parliamentary committee this tuesday. >> mitchell: is there any reason to believe they could be arrested as well? >> reporter: the committee next week is purely political, so, no, there won't be any arrests coming out of that. but there are two police criminal investigations just gearing up with lots of evidence to comb through, some of it said to be e-mails from inside the company. so i don't think anybody can predict where this thing is going to lead. >> mitchell: elizabeth palmer in london, th